Tutorial on readthedocs: FFTPower requires `mode` argument

[dstndstn]

Describe the bug

I'm following the steps on
https://nbodykit.readthedocs.io/en/latest/

and at this line

result = FFTPower(mesh, Nmu=5)

I get the error

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_1044199/248341081.py in <module>
----> 1 result = FFTPower(mesh, Nmu=5)

TypeError: __init__() missing 1 required positional argument: 'mode'

Looks like it needs a mode argument,

result = FFTPower(mesh, '1d', Nmu=5)

[rainwoodman]

Thanks! Did you find out where the source of that doc page is? If we can find it a fix should be easy (assuming the doc building infra still runs). If the doc building infra is already broken (GitHub disabled many of the old hooks and travis-ci is long gone), then we probably think a bit more on how to best effort the fix.